International Social Calendar: Henley Royal Regatta

What: Henley is a great opportunity to dust off your boaters and tea dresses and idle along the river while swigging on Pimms and watching rowing.

Etiquette: Although dress codes are still enforced, recent incidences of men fainting from the heat in the Stewards Enclosure have brought about some leniency in the rules, and dispensing with blazers is now allowed.

Highlights: Dinner at the Leander Club followed by fireworks at midnight, and then bonfires along the river until dawn.

Who: Plenty of ex-public school types, and generally a more relaxed and younger crowd than Ascot.

Tips: Make sure your dress covers your knees. “I had to wrap a pashmina around my legs because my dress was at my knee and not below it!” laughs television presenter Jane Wogan. “I whipped it off once I was in there and you should have seen the looks of disdain I got!”